CN101613975B - Method for preparing bleached chemi-mechanical pulp for culture paper making by using cotton wood to process remainder - Google Patents
Method for preparing bleached chemi-mechanical pulp for culture paper making by using cotton wood to process remainder Download PDFInfo
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Abstract
The invention discloses a method for preparing bleached chemi-mechanical pulp fore culture paper making by using cotton wood to process remainder, which belongs to the field of pulp refining for making paper. The method mainly comprises presteaming, double screw extrusion, chemical impregnation, high-consistency pulp refining by a double-screw fiberizer, adding medicament in the pulp refining process, high-consistency stay, middle-consistency pulp refining and other steps. The pulp refining process adopts single-section double-screw extrusion and single-section alkaline hydrogen peroxide impregnation, has simple process flow and compact equipment, completely adopts home equipment and saves the investment. The chemi-mechanical pulp prepared by processing cotton wood remainder through the method has the characteristics of high bulk, strength, whiteness and the like, and is suitable for pulp to be used for paper making of medium-high grade culture paper. The method achieves the cleanness and high-efficiency utilization of the remainder of the cotton wood processing factories, and is suitable for medium-small paper making enterprises for producing culture paper dependent on outsourcing goods.
Description
Technical field
The invention belongs to the pulping technique by chemical-mechanical method field, particularly a kind ofly utilize the poplar industrial wood waste to produce cultural paper to join and plagiarize the technology of floating whitening machine slurry.
Background technology
China is the production and consumption big country of paper and cardboard, the output of paper and cardboard and consumption figure Jun Ju second place of the world.But China is again the serious deficient country of wood fibre resource.For a long time, because the deficiency of wood pulp, caused the quality of China's paper, cardboard and paper products low, acute structural imbalance, and drug on the market for low-grade paper, and high-grade paper insufficiency of supply-demand is bigger, some high-grade cultures are with the import of having to rely in a large number of paper, high-grade package paper and paper products, every year must be from a large amount of commercial wood pulp of external import, and since two thousand two, the wood pulp import volume of China is sure to occupy the No. 1 in the world always.Along with the reinforcement of the whole world to ecological environmental protection, the cost of timber and products thereof import can be more and more higher, and maintaining sustained and rapid growth of pulp inlet and goods thereof badly influenced the security and the sound development of China's paper industry in recent years.Therefore, how to utilize the existing wood fibre resource of China fully efficiently, make great efforts the proportion of the lignocellulose raw material of raising paper industry, guarantee the sustainable development of China's paper industry, become the common recognition of China's pulping and paper-making industry.
Willow is middle latitude plains region, a world cultivated area maximum, and the highest speed of timber yield is given birth to one of commerical tree species.Quick growth poplar wood is because wide adaptability, has that growth is fast, the morning of becoming a useful person, output height, is easy to characteristics such as renewal, the industrial cut stock seeds in short period of felling in turn that are best suited for.Willow has become the topmost speed of China and has given birth to one of broad-leaved assortment.According to statistics, the existing Poplar Plantation area of China has reached about 8,000,000 hectares, has surpassed the summation of other countries' Poplar Plantation, ranks first in the world.Poplar Plantation timber has become one of main raw material of China's Wood Processing utilization, has brought into play important function in the sustainable development of wood-based plate.In addition, because poplar is moderate with basic density, fibre morphology is good, and timber nature whiteness height can be realized taking into account of slurry yield, intensity and whiteness three, also is a kind of comparatively suitable pulping and paper-making raw material.The researcher shows the result of the big quantity research of pulpability of poplar both at home and abroad, and the method that is suitable for poplar slurrying at present most is to adopt the bleached chemical mechanical pulping process.Adopt the bleached chemical mechanical feedback, not only can realize the high yield of poplar slurrying, and make paper pulp good bulky performance, strength character and excellent optical performance are arranged, the sandwich layer that can be used in high-grade blank and art post paperboard is copied with slurry and low quantitative offset printing newsprint, featherweight coated paper and light paper etc. joining of cultural paper.At present, poplar machine slurry pulping process worldwide is used widely.
Since nineteen ninety-five, paper industry in China Yueyang was introduced domestic article one Aspen APMP production line from Austrian Andritz OY, Hunan Tag woods paper group, Shandong Morning Ring Paper Indusrty group are successively arranged again, how tame papermaking enterprises such as the rich paper industrial limited company of Puyang, Henan dragon, Shandong spring woods, the Shandong sun, Shandong Hua Tai, Jiaozhuo, Henan Rui Feng, the U.S. profit in Ningxia or have started and have utilized quick growth poplar wood to produce the production line of bleached chemi-mechanical pulp, at present, poplar machine slurry production capacity is with nearly 2,000,000 tons/year.But domestic great majority build up or starch all whole or most of dependence on import of apparatus for production line at the poplar machine of building, and substantially all design for raw material with the former wooden shavings of 100% fresh poplar.In fact, on the one hand,, be difficult to well-off fresh log because deficiency is built in these slurrying enterprise great majority self forest land; On the other hand, the fresh log selling at exorbitant prices on the market, enterprise also is difficult to accept too high slurrying cost.Therefore, most of enterprises can not guarantee that all sufficient fresh poplar sheet wood chip supply is arranged on the pulping production line, make these enterprises all be faced with the poplar raw material of seeking alternative former wooden shavings into these production lines.At present, Puyang, the Henan rich paper of dragon is already by autonomous innovation, developed poplar brush wood P-RC-APMP pulping process technology, utilize 100% poplar brush wood commodity Chip Production to go out high-quality and float the whitening machine slurry, realized using cheap brush wood commodity wood chip to replace the higher log of cost and carried out large-scale industrial production.But, China is as the big country of cotton wood processing, the wood utilization rate is also lower in the wood-processing industry, annual also the generation has poplar industrial wood wastes such as a large amount of leftover pieces, termination and broken slab in the Wood Processing process, these industrial wood wastes mainly still act as a fuel at present to burn or be used as and produce some low value-added shaving boards, do not realize the efficient utilization of these lignocellulose raw materials.This has also caused China papermaker's attention, in recent years, some researchers of China also to the poplar industrial wood waste pulping and paper-making should be used as some researchs, but these researchs still exist bigger defective to have much room for improvement.For example " utilize rotary spherical digester prepares the slab hardwood pulp some know from experience " literary composition of delivering of 2006 27 volume B11 phase " Chinese paper industry " the 14th～15 page has been introduced with the poplar slab to be raw material, to produce the research of chemical pulp.Because what this research was adopted is chemical pulping technology, the yield of paper pulp has only about 50%, and produce bleached pulp and also need adopt chlorine-containing bleaching to bleach, the weight in wet base that makes paper pulp is lower, therefore not only the utilization rate to the poplar slab is lower for the technology of this research institute's employing, and the pollution of pulping process is comparatively serious, and the intensity of paper pulp is relatively poor, can not realize the clean and effective utilization of poplar slab.Therefore, research and develop out the novel pulping process that is fit to poplar industrial wood waste material characteristic,, realize the clean and effective utilization of poplar industrial wood waste, bigger realistic meaning is arranged to overcome the deficiency of existing poplar industrial wood waste pulping process.
Summary of the invention
The objective of the invention is in order to overcome in the existing poplar industrial wood waste pulping technique defectives such as raw material availability is low and seriously polluted, providing a kind of utilizes the poplar industrial wood waste to produce cultural paper to join the method for floating whitening machine slurry of plagiarizing, adopt production domesticization equipment fully, realize utilizing poplar industrial wood waste clean and effective to produce cultural paper and join the method for floating the whitening machine slurry of plagiarizing.
Technical scheme of the present invention is, a kind ofly utilizes the poplar industrial wood waste to produce cultural paper to join the method for floating the whitening machine slurry of plagiarizing:
(1) preparation of raw material: earlier the poplar industrial wood waste is carried out fragmentation, screen then, wash, remove impurity such as silt, the wood chip after the washing soaks again, and the time is 4～12 hours, so that the moisture content of wood chip is even;
(2) presteaming:, the material that step (1) is handled carries out the normal pressure presteaming, the structure of softening wood chip.Condition is: temperature is 100～105 ℃, and the time is 10～30 minutes;
(3) screw extrusion: adopting compression ratio is that the material that the twin (double) screw extruder of 4～6: 1 (volume ratio) is handled step (2) carries out extruding and tearing, makes the effect of being squeezed of wood chip structure and tears distortion, promotes the absorption of subsequent chemistry dipping process soup;
(4) chemical impregnation: the material after with the alkaline hydrogen peroxide soup step (3) being handled carries out chemical treatment.Treatment conditions are: hydrogen peroxide consumption 1～4% (to the over dry material), sodium hydroxide concentration 2～4% (to the over dry material), metal ion chelation agent diethylene triamine pentacetic acid (DTPA) five sodium (DTPA) consumption 0.2～0.5% (to the over dry material), sodium metasilicate consumption 1～3% (to the over dry material), magnesium sulfate consumption 0.05～0.1% (to the over dry material), dipping concentration is 30～45%, and dipping temperature is 40～80 ℃, and dip time is 15～60 minutes;
(5) high dense normal pressure defibrination: the material after with double-screw pulp-milling (4) being handled carries out high dense normal pressure defibrination, refining concentration be the over dry material heavily account for the wet stock gross weight 20～40%.Simultaneously, in double-screw pulp-milling, carry out the dosing of defibrination process.The dosing condition is: hydrogen peroxide consumption 3～10% (to the over dry material), sodium hydroxide concentration 2～6% (to the over dry material), DTPA consumption 0.2～0.5% (to the over dry material), sodium metasilicate consumption 2～6% (to the over dry material), magnesium sulfate consumption 0.05～0.1% (to the over dry material).
(6) high dense stop: utilize the high dense immixture of defibrination process and the heat energy of generation, make the slurry after step (5) is handled in the dense reserving tower of height, finish bleaching action.The temperature of reaction is 85～95 ℃, stop the reaction time is 60～120 minutes, and reaction end pH value is 8.6～9.5;
(7) slurry of finishing bleaching action with in dense mill carry out second section defibrination, refining concentration is 8～12%.The mill disposed slurry is latent through disappearing, washing, screening, last pulping.
Principle of the present invention is as follows: according to the characteristics of poplar industrial wood waste shape irregularity, it is neat and well spaced at first the poplar industrial wood waste to be carried out fragmentation respectively, and then screen respectively, wash, immersion, presteaming, double helix extruding, chemical impregnation/twin-screw high consistency refining, the dosing of defibrination process and in step process such as dense mill defibrination, the mill disposed slurry is latent through disappearing again, washing, screening, makes at last can be suitable for medium-to-high grade cultural paper and join the poplar industrial wood waste bleached pulp of starching usefulness.
Beneficial effect:
1. pulping process energy-conserving and environment-protective.What technical process adopted is the chemicals comparatively friendly to environment, and the pollution that pulping process produces is few; Bleaching action is external heat source not, makes full use of the heat energy that the defibrination process produces;
2. flow process is simple, reduced investment: pulping process adopts single hop extruding and single hop dipping, and technological process is simple, facility compact, and adopts home equipment, reduced investment fully; The raw material availability height, the pulp quality function admirable: the yield of bleached pulp of utilizing the poplar industrial wood waste to make can reach more than 85%, and tensile strength can reach more than the 38N.m/g, and whiteness can reach more than the 78%ISO, has realized the utilization of poplar industrial wood waste clean and effective.
The specific embodiment
It is neat and well spaced that the poplar industrial wood waste carries out fragmentation earlier, screen then, washing, remove impurity such as silt, wood chip after the washing soaks again, the normal pressure presteaming, material after the decatize carries out extruding and tearing with twin (double) screw extruder, carry out chemical impregnation with the alkaline hydrogen peroxide soup then, material behind the dipping carries out first section high dense normal pressure defibrination with double-screw pulp-milling, simultaneously, carry out the dosing of defibrination process in double-screw pulp-milling, the mill disposed slurry is finished bleaching action in the dense reserving tower of height, finish slurry behind the bleaching action use again in dense mill defibrination to the final required Canadian freedom of paper product, it is latent to disappear then, washing, screening, last pulping.
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment 1:
It is neat and well spaced that the poplar industrial wood waste carries out fragmentation earlier, then through screening, washing, in water, soaked 10～12 hours, use 100～105 ℃ of steam normal pressure decatize 15min again, wood chip after the decatize is with compression ratio 4～6: the twin (double) screw extruder of 1 (volume ratio) carries out extruding and tearing, and the material after the extruding and tearing carries out chemical impregnation with the alkaline hydrogen peroxide soup again.Immersion condition is: hydrogen peroxide consumption 2.0% (to the over dry material), sodium hydroxide concentration 2.0% (to the over dry material), DTPA consumption 0.3% (to the over dry material), sodium metasilicate consumption 1.0% (to the over dry material), magnesium sulfate consumption 0.05% (to the over dry material), dense (the over dry material heavily accounts for the wet stock gross weight) 40% of dipping slurry, 50 ℃ of dipping temperatures, dip time 15 minutes; Material after the impregnation process carries out first section high dense normal pressure defibrination with double-screw pulp-milling, and carries out the dosing of defibrination process in double-screw pulp-milling.The dosing condition is: hydrogen peroxide consumption 3.0% (to the over dry material), sodium hydroxide concentration 2.5% (to the over dry material), DTPA consumption 0.3% (to the over dry material), sodium metasilicate consumption 2.0% (to the over dry material), magnesium sulfate consumption 0.05% (to the over dry material).The mill disposed slurry is finished bleaching action in the dense reserving tower of height.Stopping the reaction time and be 75 minutes, reaction temperature is 88～91 ℃, and reaction end pH value is 8.96; Finishing slurry behind the bleaching action, to be mixed with 10% slurry dense, with in dense mill to be milled to Canadian freedom be paper pulp about 100mLCSF, latent, the washing of disappearing then, screening, last pulping.Pulp quality is: paper pulp yield 87.5%, tensile strength 39.0N.m/g, whiteness 78.5%ISO.This slurry is equipped with 10% the bleaching needlebush chemical pulp light paper of manufacturing paper with pulp, and the light paper quality is: tensile strength 37.0 N.m/g, bulk 1.9.0cm
3/ g, whiteness 77.2%ISO, opacity 86.0%, quality index all can meet or exceed the light paper quality requirement of light industry standard QB/T2809-2006 regulation.
Embodiment 2:
The poplar industrial wood waste carries out fragmentation earlier, then through screening, washing, in water, soaked 10～12 hours, use 100～105 ℃ of steam normal pressure decatize 15min again, wood chip after the decatize is with compression ratio 4～6: the twin (double) screw extruder of 1 (volume ratio) carries out extruding and tearing, and the material after the extruding and tearing carries out chemical impregnation with the alkaline hydrogen peroxide soup again.Immersion condition is: hydrogen peroxide consumption 2.0% (to the over dry material), sodium hydroxide concentration 2.0% (to the over dry material), DTPA consumption 0.3% (to the over dry material), sodium metasilicate consumption 1.0% (to the over dry material), magnesium sulfate consumption 0.05% (to the over dry material), dense (the over dry material heavily accounts for the wet stock gross weight) 40% of dipping slurry, 50 ℃ of dipping temperatures, dip time 15 minutes; Material after the impregnation process carries out first section high dense normal pressure defibrination with double-screw pulp-milling, and carries out the dosing of defibrination process in double-screw pulp-milling.The dosing condition is: hydrogen peroxide consumption 5.0% (to the over dry material), sodium hydroxide concentration 4.0% (to the over dry material), DTPA consumption 0.3% (to the over dry material), sodium metasilicate consumption 3.0% (to the over dry material), magnesium sulfate consumption 0.05% (to the over dry material).The mill disposed slurry is finished bleaching action in the dense reserving tower of height.Stopping the reaction time is 90 minutes, and reaction temperature is 88～91 ℃, and reaction end pH value is 9.35; Finishing slurry behind the bleaching action, to be mixed with 10% slurry dense, with in dense mill to be milled to Canadian freedom be paper pulp about 150mLCSF, latent, the washing of disappearing then, screening, last pulping.Pulp quality is: paper pulp yield 85.2%, tensile strength 52.3N.m/g, whiteness 85.6%ISO.This slurry is equipped with 10% the bleaching needlebush chemical pulp offset printing paper of manufacturing paper with pulp, the hectographic printing paper quality is: fracture length 4.65km, folding strength 13 times (two-fold is inferior), whiteness 84.2%ISO, opacity is 81.8%, and quality index all can meet or exceed the offset printing paper quality requirement of light industry standard QB/T1012-1991 regulation.
Embodiment 3
A kind ofly utilize the poplar industrial wood waste to produce cultural paper to join and plagiarize the method for floating whitening machine slurry, step is:
The first step, the preparation of raw material: earlier the poplar industrial wood waste is carried out fragmentation, screen then, wash, the wood chip after the washing soaked 4～12 hours again;
In second step, presteaming: the material that the first step is handled carried out presteaming 30 minutes under 1 atmospheric pressure, 100～105 ℃;
In the 3rd step, screw extrusion: the material that adopts twin (double) screw extruder that second step was handled carries out extruding and tearing;
The 4th step, chemical impregnation: the material of the 3rd step being handled with the alkaline hydrogen peroxide soup carries out chemical treatment, treatment conditions are: the hydrogen peroxide consumption is 4% of an over dry quality of material, sodium hydroxide concentration is 4% of an over dry quality of material, and the metal ion chelation agent consumption is 0.5% of an over dry quality of material, and the sodium metasilicate consumption is 3% of an over dry quality of material, the magnesium sulfate consumption is 0.1% of an over dry quality of material, dipping concentration is 45%, and dipping temperature is 80 ℃, and dip time is 60 minutes;
The 5th step, high dense normal pressure defibrination: the 4th material that goes on foot after handling is carried out high dense normal pressure defibrination with double-screw pulp-milling, refining concentration (the over dry material heavily accounts for the wet stock gross weight) is 40%, in the defibrination process, add the hydrogen peroxide that accounts for over dry quality of material 6%, account for the NaOH of over dry quality of material 5%, account for the metal ion chelation agent of over dry quality of material 0.5%, account for the sodium metasilicate consumption of over dry quality of material 4%, account for the magnesium sulfate of over dry quality of material 0.1%;
The 6th step, utilize the high dense immixture of defibrination process and the heat energy of generation, make the slurry after the 5th step handled in the dense reserving tower of height, finish bleaching action, reaction temperature is 85～95 ℃, stop the reaction time is 120 minutes, reaction end pH value is 9.5;
The 7th step, the slurry after the 6th step handled with in dense mill carry out second section defibrination, refining concentration is 12%, the mill disposed slurry is latent through disappearing, washing, screening, pulping at last.
Claims (3)
1. one kind is utilized the poplar industrial wood waste to produce cultural paper to join and plagiarize the method for floating whitening machine slurry, it is characterized in that step is:
The first step, the preparation of raw material: earlier the poplar industrial wood waste is carried out fragmentation, screen then, wash, the wood chip after the washing soaked 4～12 hours again;
In second step, presteaming: the material that the first step is handled carried out presteaming 10～30 minutes under 1 atmospheric pressure, 100～105 ℃;
In the 3rd step, screw extrusion: the material that adopts twin (double) screw extruder that second step was handled carries out extruding and tearing;
The 4th step, chemical impregnation: the material of the 3rd step being handled with the alkaline hydrogen peroxide soup carries out chemical treatment, treatment conditions are: the hydrogen peroxide consumption is 1～4% of an over dry quality of material, sodium hydroxide concentration is 2～4% of an over dry quality of material, the metal ion chelation agent consumption is 0.2～0.5% of an over dry quality of material, the sodium metasilicate consumption is 1～3% of an over dry quality of material, the magnesium sulfate consumption is 0.05～0.1% of an over dry quality of material, dipping concentration is 30～45%, 40～80 ℃ of dipping temperatures, dip time 15～60 minutes;
The 5th step, high dense normal pressure defibrination: the 4th material that goes on foot after handling is carried out high dense normal pressure defibrination with double-screw pulp-milling, refining concentration is 20～40%, in the defibrination process, add the hydrogen peroxide that accounts for over dry quality of material 2～6%, account for the NaOH of over dry quality of material 2～5%, account for the metal ion chelation agent of over dry quality of material 0.2～0.5%, account for the sodium metasilicate of over dry quality of material 2～5% and account for the magnesium sulfate of over dry quality of material 0.05～0.1%;
The 6th step, utilize the high dense immixture of defibrination process and the heat energy of generation, make the slurry after the 5th step handled finish bleaching action in the dense reserving tower of height, the temperature of reaction is 85～95 ℃, stop the reaction time is 60～120 minutes, and reaction end pH value is 8.6～9.5;
The 7th step, the slurry after the 6th step handled with in dense mill carry out second section defibrination, refining concentration is 8～12%, the mill disposed slurry is latent through disappearing, washing, screening, pulping at last.
2. as claimed in claim 1ly utilize the poplar industrial wood waste to produce cultural paper to join and plagiarize the method for floating whitening machine slurry, it is characterized in that described metal ion chelation agent is diethylene triamine pentacetic acid (DTPA) five sodium.
3. as claimed in claim 1ly utilize the poplar industrial wood waste to produce cultural paper to join and plagiarize the method for floating whitening machine slurry, it is characterized in that the compression ratio of described twin (double) screw extruder is a volume ratio 4～6: 1.
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| CN110747674A (en) * | 2019-10-22 | 2020-02-04 | 中国林业科学研究院林产化学工业研究所 | Method for improving wood chip preimpregnation effect in pulping process of chemical-mechanical pulp by utilizing ultrasonic technology |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1287197A (en) * | 2000-10-19 | 2001-03-14 | 东明县杨木绒毛浆厂 | Technological process of producing poplar fluff pulp |
| CN101089289A (en) * | 2007-07-04 | 2007-12-19 | 岳阳纸业股份有限公司 | Poplar ASGW pulp new process |
| CN101230552A (en) * | 2008-01-23 | 2008-07-30 | 山东轻工业学院 | Technique for chemomechanical pulp-making of poplar wood |
| CN101338532A (en) * | 2008-08-04 | 2009-01-07 | 岳阳纸业股份有限公司 | Pulping process for grinding wood pulp of cotton wood by mechanical abrader |
-
2009
- 2009-07-17 CN CN2009101813319A patent/CN101613975B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1287197A (en) * | 2000-10-19 | 2001-03-14 | 东明县杨木绒毛浆厂 | Technological process of producing poplar fluff pulp |
| CN101089289A (en) * | 2007-07-04 | 2007-12-19 | 岳阳纸业股份有限公司 | Poplar ASGW pulp new process |
| CN101230552A (en) * | 2008-01-23 | 2008-07-30 | 山东轻工业学院 | Technique for chemomechanical pulp-making of poplar wood |
| CN101338532A (en) * | 2008-08-04 | 2009-01-07 | 岳阳纸业股份有限公司 | Pulping process for grinding wood pulp of cotton wood by mechanical abrader |
Non-Patent Citations (1)
| Title |
|---|
| 邓拥军等.高白度高强度杨木APMP制浆中试研究.造纸科学与技术.2002,第21卷(第1期),8-11. * |
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